.login-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.login-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 126, 51, 0.9) 0%, rgba(255, 215, 0, 0.8) 50%, rgba(74, 144, 226, 0.9) 100%);
  background-size: 400% 400%;
  animation: gradientShift 8s ease infinite;
}

.bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 60%, rgba(255, 126, 51, 0.1) 0%, transparent 50%);
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.login-content {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100vh;
  padding: 20px;
}

.login-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 48px 40px;
  box-shadow:
    0 32px 64px rgba(0, 0, 0, 0.1),
    0 16px 32px rgba(255, 126, 51, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: 100%;
  max-width: 420px;
  animation: cardFadeIn 0.8s ease-out;
}

@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(30px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-header {
  text-align: center;
  margin-bottom: 40px;
}

.login-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 2.5rem;
  color: white;
  box-shadow: 0 8px 32px rgba(255, 126, 51, 0.4);
  animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}

.login-header h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0 0 8px 0;
  line-height: 1.2;
}

.login-header p {
  color: var(--text-color);
  opacity: 0.7;
  font-size: 1rem;
  margin: 0;
  font-weight: 400;
}

.login-button {
  width: 100%;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-color), #ff9633);
  border: none;
  font-size: 1.1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(255, 126, 51, 0.3);
}

.login-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 126, 51, 0.4);
}

.login-tips {
  margin-bottom: 32px;
}

.login-footer {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.system-info {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-color);
  opacity: 0.7;
}

@media (max-width: 480px) {
  .login-card {
    padding: 32px 24px;
    margin: 16px;
    border-radius: 20px;
  }
  
  .login-header h1 {
    font-size: 1.75rem;
  }
  
  .login-icon {
    width: 64px;
    height: 64px;
    font-size: 2rem;
  }
  
  .system-info {
    gap: 16px;
  }
  
  .info-item {
    font-size: 0.8rem;
  }
}
